<template>
    <div>
         <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
     <!-- 卡片视图 -->
    <el-card>
     <!-- 添加角色按钮区域 -->
        <el-row>
            <el-col>
                <el-button type="primary" @click="addRolesDialogVisible = true">添加角色</el-button>
            </el-col>
        </el-row>
        <el-table :data="rolelist" border stripe>
            <!-- 展开列 -->
             <el-table-column type="expand">
               <template slot-scope="scope">
                 <el-row v-for="(item1,i1) in scope.row.children" :key="item1.id" :class="['bdbottom', i1 === 0 ? 'bdtop':'','vcenter']" closable >
                   <!-- 渲染一级权限 -->
                   <el-col :span="5">
                    <el-tag @close="removeRightById(scope.row,item1.id)" closable >{{item1.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                   </el-col>
                    <!-- 渲染二三级权限 -->
                    <el-col :span="19">
                      <!-- 通过for循环嵌套渲染二级权限 -->
                    <el-row v-for="(item2,i2) in item1.children" :key="item2.id" :class="[i2 === 0 ? '' : 'bdtop','vcenter']">
                      <el-col>
                        <el-tag type="success" @close="removeRightById(scope.row,item2.id)" closable >{{item2.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                      </el-col>
                      <el-col :span="18">
                        <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" @close="removeRightById(scope.row,item3.id)" closable >
                          {{item3.authName}}
                        </el-tag>
                      </el-col>
                    </el-row>
                    </el-col>
                 </el-row>
               </template>
             </el-table-column>
            <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showRolesEditDialog(scope.row.id)">编辑</el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRolesById(scope.row.id)">删除</el-button>
                <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
        </el-table-column>
        </el-table>
    </el-card>
            <!-- 添加角色对话框 -->
            <el-dialog title="添加角色" :visible.sync="addRolesDialogVisible" width="50%" @close="addRolesDialogClosed">
                 <!-- 内容主体区域 -->
            <el-form
                :model="addRolesForm" :rules="addRolesFormRules"
                ref="addRolesFormRef"
                label-width="70px">
                <el-form-item label="角色名" prop="roleName">
                <el-input v-model="addRolesForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="addRolesForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addRolesDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRoles">确 定</el-button>
            </span>
            </el-dialog>

            <!-- 修改用户对话框 -->
    <el-dialog title="修改用户" :visible.sync="editRolesDialogVisible" width="50%" @close="editRolesDialogClosed">
    <el-form :model="editRolesForm" :rules="editRolesFormRules" ref="editRolesFormRef" label-width="70px">
    <el-form-item label="角色名" prop="roleName">
    <el-input v-model="editRolesForm.roleName"></el-input>
    </el-form-item>
    <el-form-item label="角色描述" prop="roleDesc">
    <el-input v-model="editRolesForm.roleDesc"></el-input>
    </el-form-item>
    </el-form>
    <span slot="footer" class="dialog-footer">
      <el-button @click="editRolesDialogVisible = false">取 消</el-button>
      <el-button type="primary" @click="editRolesInfo">确 定</el-button>
    </span>
  </el-dialog>
        <!-- 分配权限的对话框 -->
      <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
        <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" ref="treeRef" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有觉得列表数据
      rolelist: [],
      // 控制添加角色用户对话框的显示与隐藏
      addRolesDialogVisible: false,
      // 添加角色表单数据
      addRolesForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单的验证规则对象
      addRolesFormRules: {
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          {
            min: 1,
            max: 10,
            message: '角色名不能为空且小于10个字符',
            trigger: 'blur'
          }
        ]
      },
      // 控制修改角色用户对话框的显示与隐藏
      editRolesDialogVisible: false,
      // 查询到的角色信息对象
      editRolesForm: {},
      editRolesFormRules: {
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          {
            min: 1,
            max: 10,
            message: '角色名不能为空且小于10个字符',
            trigger: 'blur'
          }
        ]
      },
      // 控制权限分配对话框的显示与隐藏
      setRightDialogVisible: false,
      rightslist: [],
      // 树形组件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },

  created () {
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolelist = res.data

      console.log(this.rolelist)
    },
    addRolesDialogClosed () {
      this.$refs.addRolesFormRef.resetFields()
    },
    addRoles () {
      this.$refs.addRolesFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加角色的网络请求
        const { data: res } = await this.$http.post('roles', this.addRolesForm)

        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败')
        }
        this.$message.success('添加角色成功')
        // 隐藏添加角色的对话框
        this.addRolesDialogVisible = false
        this.getRolesList()
      })
    },
    async showRolesEditDialog (id) {
      // console.log(id)

      const { data: res } = await this.$http.get('roles/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editRolesDialogVisible = true
      this.editRolesForm = res.data
    },
    // 监听修改用户对话框的关闭事件
    editRolesDialogClosed () {
      this.$refs.editRolesFormRef.resetFields()
    },
    // 修改用户信息并提交
    editRolesInfo () {
      this.$refs.editRolesFormRef.validate(async (valid) => {
        if (!valid) return
        console.log(this.editRolesForm)
        // 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put('roles/' + this.editRolesForm.roleId, {
          roleName: this.editRolesForm.roleName,
          roleDesc: this.editRolesForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('更新用户信息失败')
        }
        // 关闭对话框
        this.editRolesDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('更新用户信息成功')
      })
    },
    // 根据id删除对应的用户信息
    async removeRolesById (id) {
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 如果用户确认删除  返回值蔚confirm
      // 如果用户取消删除  返回值蔚cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除用户成功')
      this.getRolesList()
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除用户成功')
      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取页面数据失败')
      }
      // 获取到的权限数据保存到data中
      this.rightslist = res.data
      console.log(this.rightslist)
      // 递归获取当前节点id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        // 如果当前node节点不包含children属性，则是三级节点
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getLeafKeys(item, arr))
    },
    // 监听权限分配对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
